JDBC how to call a stored procedure

JDBC development steps:

1. Import driver package (the package itself Baidu download the ojdbc14.jar)
2. Registration drive
3. Get connected
4. Gets the SQL statement executed
5. Packaging Parameters
6. SQL execution
7. Getting Results
8. Release resources

Import java.sql.CallableStatement Sets;
 Import the java.sql.Connection;
 Import the java.sql.DriverManager;
 Import the java.sql.ResultSet; 
 
Import org.junit.Test; 
 
Import oracle.jdbc.OracleCallableStatement;
 Import oracle.jdbc.driver.OracleTypes ; 
 
/ * 
  1. import driver package 
  2. Register drive 
  3 acquires the connection 
  4. Get executing SQL Statement 
  5. the package parameters 
  6. execute SQL 
  7. the results acquired 
  8. the release resources    
 * / 
public  class TestProcedure { 
 
    @Test 
    / * 
     Create Procedure proc_gettotalsal the replace or (in Number The vempno, vtotalsal Number The OUT) 
    IS
           
    begin
      select sal*12 + nvl(comm,0) into vtotalsal from emp where empno = vempno;
    end;
     * */
    public void test1() throws Exception{
        //注册驱动
        Class.forName("oracle.jdbc.driver.OracleDriver");
        //2.获取连接
        String url = "jdbc:oracle:thin:@192.168.80.100:1521:orcl";
        String username = "dakang";
        String password = "dakang";
        Connection conn = DriverManager.getConnection(url, username, password);
        //3. execute the SQL statement to obtain a fixed format proc_gettotalsal which is a function of memory. 
        String SQL = "{Call proc_gettotalsal (,??)}" ; 
        CallableStatement State = conn.prepareCall (SQL);
         // set of input parameters 
        state. setInt (. 1, 7788); // set the employee number
         // Register output parameter type 
        state.registerOutParameter (2 , OracleTypes.NUMBER); 
        
        // 4. execution Statement 
        state.execute (); 
        
        // 5. The execution result acquired 
        int totalsal state.getInt = (2 ); 
        
        // output 
        System.out.println ( "salary:" + totalsal); 
        
        // 6. The release resources
         state.close ();
        conn.Close (); 
    } 
    
    // call the stored function 
    / * 
     Create or Replace function func_getsal (vempno Number) Number return 
    IS 
      - declare variables saved salary. 
      vtotalsal Number;      
    the begin 
      SELECT * SAL 12 is + NVL (COMM, 0) INTO vtotalsal EMP WHERE EMPNO = vempno from; 
      return vtotalsal; 
    End; 
     * / 
    @Test 
    public  void test2 () throws Exception {
         // Register drive 
        the Class.forName ( "oracle.jdbc.driver.OracleDriver" );
         // 2. Get the connection 
        String = URL "JDBC: Oracle: Thin: @ 192.168.80.100: 1521: ORCL" ;
        Username String = "Dakang" ; 
        String password = "Dakang" ; 
        Connection conn = DriverManager.getConnection (url, username, password);
         // 3. obtain execution of SQL statement 
        String sql = "{= call func_getsal ? (?)} " ; 
        CallableStatement State = conn.prepareCall (SQL);
         // 4. package parameters
         // Register return argument type 
        state.registerOutParameter (. 1 , OracleTypes.NUMBER);
         // set the second parameter 
        state.setInt (2, 7788 ) ;
         // 5. SQL execution
         state.execute ();        
         //6. The acquisition result 
        int totalsal state.getInt = (. 1 ); 
        System.out.println ( "salary: ====" + totalsal);        
         // 7. The release resources 
        state.close (); 
        conn.Close (); 
    } 
    
    / * 
     Create or Replace Procedure proc_getemps (vrows SYS_REFCURSOR OUT) 
        IS 
        
        the begin 
          --1 open cursor, the cursor to the assignment. 
          open vrows for SELECT * from EMP; 
        End; 
     * * / 
    @Test 
    public  void Test3 () throws Exception {
         // registration drive
        Class.forName("oracle.jdbc.driver.OracleDriver");
        //2.获取连接
        String url = "jdbc:oracle:thin:@192.168.80.100:1521:orcl";
        String username = "dakang";
        String password = "dakang";
        Connection conn = DriverManager.getConnection(url, username,password);
        //3.获取执行SQL的statement
        String sql = "{call proc_getemps(?)}";
        CallableStatement call = conn.prepareCall(sql);
        //接口  --- > 对象 -->Implementation class name 
=         System.out.println (call.getClass ().getName());
        OracleCallableStatement oracleCall (OracleCallableStatement) Call;
         // 4. registered output types of parameters 
        call.registerOutParameter (. 1 , OracleTypes.CURSOR);
         // 5. The execute the SQL 
        call.execute ();
         // 6. The acquired execution result 
        ResultSet resultSet = oracleCall.getCursor (. 1 );
         the while (ResultSet.next ()) {
             int EMPNO = ResultSet.getInt ( "EMPNO" ); 
            String name = resultSet.getString ( "ename" ); 
            System.out.println (EMPNO + "= === "+ name); 
        } 
        
        // 7. The release of resources
         ResultSet.close (); 
        call.close ();
        conn.close();
    }
}